Patent US3303497A successfully refreshed from Google Patents.
US3303497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time expansion radar
Assignee: Individual
•
Filing: 1963-03-28
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Granted: 1967-02-07
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Expires: 1983-03-28
Abstract
No abstract record available.
Inventors
- 👤 Charles F Chubb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:00
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/08; G01S13/10; G01S13/26; G01S13/28; G01S13/282
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
146 words
A TIME-RANGE EXPANSION RADAR COMBINING PULSE COMPRESSION AND FREQUENCY COMPARISON TECHNIQUES COMPRISING: A SWEEP GENERATOR; A RADAR SYSTEM FOR TRANSMITTING AND RECEIVING SWEEP FREQUENCY PULSES INCLUDING A VOLTAGE TUNABLE SOURCE TUBE HAVING AN OUTPUT CONTROLLED IN FREQUENCY SWEEPS BY SAID SWEEP GENERATOR AND MODULATED BY PULSES OF FINITE DURATION; A RANGE TRACKING CIRCUIT HAVING AN OUTPUT; A RECEIVER CHANNEL INCLUDING A MIXER, AN INTERMEDIATE FREQUENCY NETORK, AND A PULSE COMPRESSION CIRCUIT WITH AN OUTPUT COUPLED TO SAID RANGE TRACKING CIRCUIT, THE OUTPUT OF SAID RANGE TRACKING CIRCUIT BEING COUPLED TO SAID SWEEP GENERATOR TO CAUSE SAID VOLTAGE TUNABLE SOURCE TUBE TO PRODUCE SECONDARY SWEEP FREQUENCIES, SAID VOLTAGE TUNABLE SOURCE TUBE OUTPUT BEING COUPLED TO SAID MIXER TO PRODUCE FREQUENCY COMPARISON OF THE ECHO AND SECONDARY SWEEP FREQUENCY SIGNALS; AND AN INDICATOR COUPLED TO THE OUTPUT OF SAID PULSE COMPRESSION CIRCUIT TO INDICATE THE TARGET BEING TRACKED
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |